Which are the best free tools available to create sitemaps?

A sitemap is a file. This file will have all the URLs on the Website. It is a part of site design and search engine optimisation. (SEO).
Following are some of the tools that are useful for the same.
1. XML
2. Screaming Frog XML
3. Inspyder
4. Flowmapp
5. Gitmind
6. Google XML
7.Yoast SEO
8. write maps
9. Slickplan
All the above tools are free and very reliable.

The list of free tools available for generating sitemap files online is well-said above by Dr.N.V. Srinivasa Rao sir. But, if you search Google with the keyword "sitemap generator online", much more new sites will come up. No need to worry about generating sitemaps manually, if you are creating websites using any of the following CMS.

1. Self-hosted sites (WordPress, Drupal, Magento, etc.)
2. Static website builder and blogs (Blogger, Wix, Medium, etc. )

If you use any of the above CMS, a sitemap file is automatically generated and available on specific links. Mostly, the sitemap link will be like yourwebsite.com/sitemap.xml. To understand more specifically, let's take this example.

1. Blogger blog sitemap (yourwebsite.com/sitemap.xml)
2. WordPress site sitemap (yourwebsite.com/wp-sitemap.xml)

So, you need not create a sitemap file separately. If you are hosting your website directly without any CMS, then only you will have to generate a sitemap file for your website or blog. In that case, you can go to a free sitemap generator site and use it.

A sitemap is a method of organizing a website, identifying the URLs and the data under each section. Earlier, the sitemaps were primarily geared toward the users of the website.
Here are some tools that are useful for the sitemap.
1. Visual
2. Screaming Frog XML
3. XML
4. Flowmapp
5. Gitmind
6. Google XML
7. HTML
8. write mapsPn
9. Slickplan
All the above mentioned tools are reliable

A site map is a way of managing a website. This would require identification of the URL and the data available in each section of the website. A lot of free tools are available for the benefits of consumers and a few are listed below to be used in their sitemap.
1) HTML
2) Goggle XML.
3) Visual
4) Slickplan
5) Inspyder
6) Write maps.
7) Gitmind
These tools are convenient to be used and at the same it available free.